<%--
  Created by IntelliJ IDEA.
  User: 高森森
  Date: 2021/2/5
  Time: 15:17
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%--		分页条--%>
<div id="page_nav">
    <%--大于首页，才显示上一个--%>
    <c:if test="${requestScope.page.pageNo>1}">
        <a href="${requestScope.page.url}&pageNo=1">首页</a>
        <a href="${requestScope.page.url}&pageNo=${requestScope.page.pageNo-1}">上一页</a>
    </c:if>

    <c:choose>
        <%--情况1 ：如果总页码小于等于5的情况，页码范围是1-总页码--%>
        <c:when test="${requestScope.page.pageTotal<=5}">
            <c:forEach begin="1" end="${requestScope.page.pageTotal}" var="i">
                <c:if test="${i==requestScope.page.pageNo}">
                    【${i}】
                </c:if>
                <c:if test="${i!=requestScope.page.pageNo}">
                    <a href="${requestScope.page.url}&pageNo=${i}">${i}</a>
                </c:if>
            </c:forEach>
        </c:when>
        <%--情况2 ：如果总页码大于5的情况，假设一共有十页--%>
        <c:when test="${requestScope.page.pageTotal>5}">
            <c:choose>
                <%--情况2.1d当前页码是前面三个：1，2，3的情况，页码范围1-5--%>
                <c:when test="${requestScope.page.pageNo<=3}">
                    <c:forEach begin="1" end="5" var="i">
                        <c:if test="${i==requestScope.page.pageNo}">
                            【${i}】
                        </c:if>
                        <c:if test="${i!=requestScope.page.pageNo}">
                            <a href="${requestScope.page.url}&pageNo=${i}">${i}</a>
                        </c:if>
                    </c:forEach>
                </c:when>
                <%--						情况2.2：当前页码为最后三个，8，9，10页码的范围是总页码-4到总页码--%>
                <c:when test="${requestScope.page.pageNo>requestScope.page.pageTotal-3}">
                    <c:forEach begin="${requestScope.page.pageTotal-4}" end="${requestScope.page.pageTotal}" var="i">
                        <c:if test="${i==requestScope.page.pageNo}">
                            【${i}】
                        </c:if>
                        <c:if test="${i!=requestScope.page.pageNo}">
                            <a href="${requestScope.page.url}&pageNo=${i}">${i}</a>
                        </c:if>
                    </c:forEach>
                </c:when>
                <%--						情况2.3：4,5,6,7,页码范围是：当前页码减二到当前页码加二--%>
                <c:otherwise>
                    <c:forEach begin="${requestScope.page.pageNo-2}" end="${requestScope.page.pageNo+2}" var="i">
                        <c:if test="${i==requestScope.page.pageNo}">
                            【${i}】
                        </c:if>
                        <c:if test="${i!=requestScope.page.pageNo}">
                            <a href="${requestScope.page.url}&pageNo=${i}">${i}</a>
                        </c:if>
                    </c:forEach>
                </c:otherwise>
            </c:choose>
        </c:when>
    </c:choose>




    <%--			【${requestScope.page.pageNo}】--%>

    <%--如果已经是最后一页，则不显示下一页--%>
    <c:if test="${requestScope.page.pageNo<requestScope.page.pageTotal}">
        <a href="${requestScope.page.url}&pageNo=${requestScope.page.pageNo+1}">下一页</a>
        <a href="${requestScope.page.url}&pageNo=${requestScope.page.pageTotal}">末页</a>
    </c:if>
    共${requestScope.page.pageTotal}页，${requestScope.page.pageTotalCout}条记录 到第<input value="${param.pageNo}" name="pn" id="pn_input"/>页
    <input id="searchPageButton" type="button" value="确定">
    <script type="text/javascript">
        $("#searchPageButton").click(
            function () {
                var pageNo=	$("#pn_input").val();
                //javascript语言中提供了一个叫做location的地址栏对象
                //它有一个属性叫做href，它可以获取浏览器地址栏中的地址
                //href属性可读可写
                if(pageNo>=1&&pageNo<=${requestScope.page.pageTotal})

                {
                    location.href="${pageScope.basePath}"+"${requestScope.page.url}&pageNo="+pageNo;
                }
            }
        )
    </script>
</div>
</div>